That's right, new Arkham game coming out. It's a prequel to the other 2, and it will feature Deathstroke. That's all I know right now. Put anything related to it here.
I heard. Apparently Rocksteady is doing a separate super-hero next gen game. If my memory is right, its something like Batman vs Joker. I dunno about that.
The story apparently is a Batman origin, but it is the story of how Batman came to meet some of his greatest enemies. All I know about the story so far is that it takes place on Christmas eve, when several ace assassins are hired to kill Batman, one being Deathstroke.
I think that the only reason they are going to a prequel is to bring back the Joker, so it probably is a cheep money maker. Bane is also suposildy a big role, to milk off the dark knight rises.